Bigfoot, also known as Sasquatch, in Canadian folklore and American folklore, is an ape-like creature that is said to inhabit the forests of North America. Supposed evidence of Bigfoot's existence is based on a number of disputed video recordings, audio recordings, photographs, visual sightings, casts of large footprints, etc. Some of these are speculated or known to be hoaxes.
Folklorists trace the figure of Bigfoot to a combination of factors and sources, including folklore surrounding the European wild man figure, folk belief among Native Americans and loggers, and a cultural increase in environmental concerns. Within the fringe subculture of cryptozoology Bigfoot is considered a cryptid, however the majority of mainstream scientists have historically discounted the existence of Bigfoot, considering it to be a combination of folklore, misidentification, and hoax, rather than a living animal.
Thousands of people have claimed to have seen Bigfoot and it is commonly described as a large, muscular, bipedal ape-like creature, roughly 6–9 feet (1.8–2.7 m), covered in hair described as black, dark brown, or dark reddish. A pungent, foul smelling odor is sometimes associated with reports of the creature as well.
The enormous footprints for which the creature is named are claimed to be as large as 24 inches (60 cm) long and 8 inches (20 cm) wide. Some footprint casts have also contained claw marks, making it likely that they came from known animals such as bears, which have five toes and claws.
Ecologist Robert Pyle argues that most cultures have accounts of human-like giants in their folk history, expressing a need for "some larger-than-life creature." Each language had its own name for the creature featured in the local version of such legends. Many names meant something along the lines of "wild man" or "hairy man", although other names described common actions that it was said to perform, such as eating clams or shaking trees. Chief Mischelle of the Nlaka'pamux at Lytton, British Columbia told such a story to Charles Hill-Tout in 1898; he named the creature by a Salishan variant meaning "the benign-faced-one".
Members of the Lummi tell tales about Ts'emekwes, the local version of Bigfoot. The stories are similar to each other in the general descriptions of Ts'emekwes, but details differed among various family accounts concerning the creature's diet and activities. Some regional versions tell of more threatening creatures. The stiyaha or kwi-kwiyai were a nocturnal race. Children were warned against saying the names, lest the monsters hear and come to carry off a person—sometimes to be killed. In 1847, Paul Kane reported stories by the Indians about skoocooms, a race of cannibalistic wildmen living on the peak of Mount St. Helens in southern Washington state. Also related to this area was an alleged incident in 1924 in which a violent encounter between a group of miners and a group of "ape men" occurred. These allegations were reported in the July 16, 1924, issue of The Oregonian and have become a popular piece of Bigfoot folklore and the area is now referred to as Ape Canyon.
Less-menacing versions have also been recorded, such as one by Reverend Elkanah Walker from 1840. Walker was a Protestant missionary who recorded stories of giants among the Indians living near Spokane, Washington. The Indians said that these giants lived on and around the peaks of nearby mountains and stole salmon from the fishermen's nets.
In the 1920s, Indian Agent J. W. Burns compiled local stories and published them in a series of Canadian newspaper articles. They were accounts told to him by the Sts'Ailes people of Chehalis and others. The Sts'Ailes and other regional tribes maintained that the Sasquatch were real. They were offended by people telling them that the figures were legendary. According to Sts'Ailes accounts, the Sasquatch preferred to avoid white men and spoke the Lillooet language of the people at Port Douglas, British Columbia at the head of Harrison Lake. These accounts were published again in 1940. Burns borrowed the term Sasquatch from the Halkomelem sásq'ec (IPA: [ˈsæsqʼəts]) and used it in his articles to describe a hypothetical single type of creature portrayed in the local stories.
Spotted Elk, bears, and the origin of the "Bigfoot" name
The name "Big Foot" first gained renown by a Wyandot chief with that nickname in the 1830s "who derived his name from the immense size of his feet. His height considerably exceeded six feet, and his strength was represented as Herculean. He also had five brothers, but little inferior to himself in size and in courage, and as they generally went in company they were the terror of the country." Later in the 19th century Spotted Elk was also called Chief Big Foot; he was a well-known Lakota leader killed during the Wounded Knee Massacre in 1890. The two Native Americans may have been the namesakes for two fabled bears in the West. In the late 19th and early 20th centuries, at least two enormous marauding grizzly bears were widely noted in the press and each nicknamed "Bigfoot". This may have inspired the common name of the ape-creature and been a matter of confusion in early stories. The name began to become more widespread as a reference to the Sasquatch after a photo of bulldozer operator Jerry Crew holding a cast of a track was spread by wire service in 1958.
The first grizzly bear Bigfoot was reportedly killed near Fresno, California in 1895 after killing sheep for 15 years; his weight was estimated at 2,000 pounds (900 kg). The second one was active in Idaho in the 1890s and 1900s between the Snake and Salmon rivers, and nearly supernatural powers were attributed to it.
Nearly twice the size of an ordinary grizzly, Bigfoot for years has levied his tribute of prime steers and no one has been found brave enough or clever enough to catch or kill him. With a single blow of his giant paw he kills the largest and best animal he can find and he usually takes the pick of a herd. He makes a single meal of the animal, and it is usually a meal that would provide a camp full of men for a week, and disappears, never to return to that locality again that season.
About one-third of all claims of Bigfoot sightings are located in the Pacific Northwest, with the remaining reports spread throughout the rest of North America. Most reports are considered mistakes or hoaxes, even by those researchers who say that Bigfoot exists.
Bigfoot has become better known and a phenomenon in popular culture, and sightings have spread throughout North America but predominantly occur in the pacific northwestern region of Washington, Oregon, Northern California, and British Columbia. Other prominent areas of supposed sightings include the rural areas of the Great Lakes region and the Southeastern United States. Many of these regions have differentiating names for the creature, such as "Grassman" and "Skunk Ape". The debate over the legitimacy of Bigfoot sightings reached a peak in the 1970s, and Bigfoot has been regarded as the first widely popularized example of pseudoscience in American culture.
Individuals researching the phenomenon of Bigfoot or alleged eye witnesses have indicated a number of disputed behaviors supposedly related to the creature. Some of these reported behaviors include patterned, repetitive knocking sounds said to be produced by objects such as rocks or logs commonly called "wood knocking", rock throwing, and vocalizations such as howls, moans, grunts, whistles, and even a form of supposed language. Some of these alleged vocalization recordings have been analyzed by individuals such as retired U.S. Navy cryptologic linguist Scott Nelson. Nelson analyzed audio recordings from the early 1970s said to be recorded in the Sierra Nevada mountains dubbed the "Sierra Sounds" and stated, "It is definitely a language, it is definitely not human in origin, and it could not have been faked".  Additionally, structures constructed of broken and twisted tree limbs seemingly placed in specific areas have been discovered in forests and have been attributed to Bigfoot.  Many alleged sightings are reported to occur at night leading to some speculations that the creatures may possess nocturnal tendencies. However, mainstream science largely disputes this claim as all known apes. including humans, are diurnal with only lesser primates possessing nocturnality. 
Proposed explanations for sightings
Various explanations have been suggested for the sightings and to offer conjecture on what type of creature Bigfoot might be. Scientists typically attribute sightings either to hoaxes or to misidentification of known animals and their tracks, particularly black bears.
In 2007, the Bigfoot Field Researchers Organization put forward some photos which they claimed showed a juvenile Bigfoot. The Pennsylvania Game Commission, however, said that the photos were of a bear with mange. Anthropologist Jeffrey Meldrum, and Ohio scientist Jason Jarvis on the other hand, said that the limb proportions of the creature were not bear-like, they were "more like a chimpanzee."
Both Bigfoot believers and non-believers agree that many of the reported sightings are hoaxes or misidentified animals. Author Jerome Clark argues that the Jacko Affair was a hoax, involving an 1884 newspaper report of an apelike creature captured in British Columbia. He cites research by John Green, who found that several contemporaneous British Columbia newspapers regarded the alleged capture as highly dubious, and notes that the Mainland Guardian of New Westminster, British Columbia wrote, "Absurdity is written on the face of it."
Tom Biscardi is a long-time Bigfoot enthusiast and CEO of Searching for Bigfoot Inc. He appeared on the Coast to Coast AM paranormal radio show on July 14, 2005 and said that he was "98% sure that his group will be able to capture a Bigfoot which they had been tracking in the Happy Camp, California area." A month later, he announced on the same radio show that he had access to a captured Bigfoot and was arranging a pay-per-view event for people to see it. He appeared on Coast to Coast AM again a few days later to announce that there was no captive Bigfoot. He blamed an unnamed woman for misleading him, and said that the show's audience was gullible.
On July 9, 2008, Rick Dyer and Matthew Whitton posted a video to YouTube, claiming that they had discovered the body of a dead Sasquatch in a forest in northern Georgia. Tom Biscardi was contacted to investigate. Dyer and Whitton received $50,000 from Searching for Bigfoot, Inc. as a good faith gesture. The story was covered by many major news networks, including BBC, CNN, ABC News, and Fox News. Soon after a press conference, the alleged Bigfoot body was delivered in a block of ice in a freezer with the Searching for Bigfoot team. When the contents were thawed, observers found that the hair was not real, the head was hollow, and the feet were rubber. Dyer and Whitton admitted that it was a hoax after being confronted by Steve Kulls, executive director of SquatchDetective.com.
In January 2014, Rick Dyer, perpetrator of a previous Bigfoot hoax, said that he had killed a Bigfoot creature in September 2012 outside San Antonio, Texas. He said that he had scientific tests performed on the body, "from DNA tests to 3D optical scans to body scans. It is the real deal. It's Bigfoot, and Bigfoot's here, and I shot it, and now I'm proving it to the world." He said that he had kept the body in a hidden location, and he intended to take it on tour across North America in 2014. He released photos of the body and a video showing a few individuals' reactions to seeing it, but never released any of the tests or scans. He refused to disclose the test results or to provide biological samples. He said that the DNA results were done by an undisclosed lab and could not be matched to identify any known animal. Dyer said that he would reveal the body and tests on February 9, 2014 at a news conference at Washington University, but he never made the test results available. After the Phoenix tour, the Bigfoot body was taken to Houston. On March 28, 2014, Dyer admitted on his Facebook page that his "Bigfoot corpse" was another hoax. He had paid Chris Russel of Twisted Toy Box to manufacture the prop from latex, foam, and camel hair, which he nicknamed "Hank". Dyer earned approximately US$60,000 from the tour of this second fake Bigfoot corpse. He said that he did kill a Bigfoot, but did not take the real body on tour for fear that it would be stolen.
Bigfoot proponents Grover Krantz and Geoffrey H. Bourne believed that Bigfoot could be a relict population of Gigantopithecus. All Gigantopithecus fossils were found in Asia, but according to Bourne, many species of animals migrated across the Bering land bridge and he suggested that Gigantopithecus might have done so, as well. Gigantopithecus fossils have not been found in the Americas. The only recovered fossils are of mandibles and teeth, leaving uncertainty about Gigantopithecus's locomotion. Krantz has argued that Gigantopithecus blacki could have been bipedal, based on his extrapolation of the shape of its mandible. However, the relevant part of the mandible is not present in any fossils. An alternative view is that Gigantopithecus was quadrupedal. The Gigantopithecus's enormous mass would have made it difficult for it to adopt a bipedal gait.
Matt Cartmill criticizes the Gigantopithecus hypothesis:
The trouble with this account is that Gigantopithecus was not a hominin and maybe not even a crown group hominoid; yet the physical evidence implies that Bigfoot is an upright biped with buttocks and a long, stout, permanently adducted hallux. These are hominin autapomorphies, not found in other mammals or other bipeds. It seems unlikely that Gigantopithecus would have evolved these uniquely hominin traits in parallel.
Bernard G. Campbell writes: "That Gigantopithecus is in fact extinct has been questioned by those who believe it survives as the Yeti of the Himalayas and the Sasquatch of the north-west American coast. But the evidence for these creatures is not convincing."
Primatologist John R. Napier and anthropologist Gordon Strasenburg have suggested a species of Paranthropus as a possible candidate for Bigfoot's identity, such as Paranthropus robustus, with its gorilla-like crested skull and bipedal gait —despite the fact that fossils of Paranthropus are found only in Africa.
Michael Rugg of the Bigfoot Discovery Museum presented a comparison between human, Gigantopithecus, and Meganthropus skulls (reconstructions made by Grover Krantz) in episodes 131 and 132 of the Bigfoot Discovery Museum Show. He favorably compares a modern tooth suspected of coming from a Bigfoot to the Meganthropus fossil teeth, noting the worn enamel on the occlusal surface. The Meganthropus fossils originated from Asia, and the tooth was found near Santa Cruz, California.
In 2013, ZooBank - the non-governmental organization that is generally accepted by Zoologists to assign species names, approved the registration request for the species name Homo sapiens cognatus to be used for the reputed hominid more familiarly known as Bigfoot or Sasquatch. "Cognatus" is a Latin term meaning "related by blood."
The request was made by Dr. Melba S. Ketchum, D.V.M. Moody Scholar and lead scientist of The Sasquatch Genome Project following publication of "Novel North American Hominins, Next Generation Sequencing of Three Whole Genomes and Associated Studies, "Ketchum, M. S., et al, in the DeNovo: Journal of Science, 13 Feb 2013. The article examined 111 samples of blood, tissue, hair, and other specimens "characterized and hypothesized" to have been "obtained from elusive hominins in North America commonly referred to as Sasquatch." Zoobank is an adjunct to the International Commission on Zoological Nomenclature or ICZN. The Sasquatch Genome Project is a collaboration of an interdisciplinary team of scientists from independent, public, and academic laboratories. DeNovo is a multi-disciplinary scientific journal providing three levels of peer review.
This is only the first official step in scientific recognition of the species. The following step would be to secure the recognition and inclusion of a DNA sample from Homo sapiens cognatus by GenBank a DNA repository whose catalogue, though incomplete, is well recognized by the scientific community. GenBank provides standardized accepted procedures for the collection and analysis of DNA samples.
According to a statement by an ICZN associate scientist, "ZooBank and the ICZN do not review evidence for the legitimacy of organisms to which names are applied – that is outside our mandate, and is really the job of the relevant taxonomic/biological community (in this case, primatologists) to do that. When H. s. cognatus was first registered, needless to say we received a lot of inquiry about it. We scrutinized the original description and registration of this name as best as we could, and as far as we can determine, all the requirements for establishing the new name were fulfilled. Thus, at the moment, we have no grounds to reject the scientific name. This says nothing about the legitimacy of the taxon concept – it’s just about whether the name was established according to the rules." There is no single organization of primatologists imbued to provide recognition of evidence for the legitimacy. Opinions of individual primatologists are disparate but generally antagonistic.
The evidence advanced supporting the existence of such a large, ape-like creature has often been attributed to hoaxes or delusion rather than to sightings of a genuine creature. In a 1996 USA Today article, Washington State zoologist John Crane said, "There is no such thing as Bigfoot. No data other than material that's clearly been fabricated has ever been presented." In addition, scientists cite the fact that Bigfoot is alleged to live in regions unusual for a large, nonhuman primate, i.e., temperate latitudes in the northern hemisphere; all recognized apes are found in the tropics of Africa and Asia.
However, primatologist Jane Goodall told National Public Radio, "Well now you will be amazed when I tell you that I'm sure that they (referring to Bigfoots) exist." Dmitri Bayanov, Chairman of the Smolin Seminar on Questions of Hominology at the Darwin Museum, Moscow, Russia tells us, "All researchers versed in this science do know that Bigfoot is a mammal, not myth, because of the females' conspicuous mammae. All know that Bigfoot is a primate because of the dermal ridges on its soles, a diagnostic characteristic of primates. All hominologists, respectful of logic and the current classification of primates, know that Bigfoot is a non-sapiens hominid because of its nonhuman way of life and bipedalism. ... I think that one of the great scientific results of the 20th century was the discovery of relict hominids (homins, for short), popularly known as Abominable Snowman, Yeti, Yeren, Almas, Almasty, Bigfoot, Sasquatch, etc. Actually, it was a re-discovery by hominologists of what had been known to western naturalists from antiquity to the middle of the 18th century, when wild bipedal primates were classified by Carl Linnaeus as Homo troglodytes (i.e., caveman) or Homo sylvestris (i.e., woodman, forestman). As for eastern scholars and rural population in many parts of the world, they have always been aware of wild hairy bipeds, known under diverse popular names."
Yet many other mainstream scientists do not consider the subject of Bigfoot to be a fertile area for credible science and there have been a limited number of formal scientific studies of Bigfoot.
As with other similar beings, climate and food supply issues would make such a creature's survival in reported habitats unlikely. Great apes have not been found in the fossil record in the Americas, and no Bigfoot remains are known to have been found. Phillips Stevens, a cultural anthropologist at the University at Buffalo, summarized the scientific consensus as follows:
It defies all logic that there is a population of these things sufficient to keep them going. What it takes to maintain any species, especially a long-lived species, is you gotta have a breeding population. That requires a substantial number, spread out over a fairly wide area where they can find sufficient food and shelter to keep hidden from all the investigators.
In the 1970s, when Bigfoot "experts" were frequently given high-profile media coverage, Mcleod writes that the scientific community generally avoided lending credence to the theories by debating them.
Ivan T. Sanderson and Bernard Heuvelmans have spent parts of their career searching for Bigfoot. Later scientists who researched the topic included Jason Jarvis, Carleton S. Coon, George Allen Agogino and William Charles Osman Hill, although they came to no definite conclusions and later drifted from this research.
Anthropologist Jeffrey Meldrum has said that the fossil remains of an ancient giant ape called Gigantopithecus could turn out to be ancestors of today's commonly known Bigfoot. John Napier asserts that the scientific community's attitude towards Bigfoot stems primarily from insufficient evidence. Other scientists who have shown varying degrees of interest in the creature are David J. Daegling, George Schaller, Russell Mittermeier, Daris Swindler, Esteban Sarmiento, and Carleton S. Coon.
The first scientific study of available evidence was conducted by John Napier and published in his book, Bigfoot: The Yeti and Sasquatch in Myth and Reality, in 1973. Napier wrote that if a conclusion is to be reached based on scant extant "'hard' evidence," science must declare "Bigfoot does not exist." However, he found it difficult to entirely reject thousands of alleged tracks, "scattered over 125,000 square miles" (325,000 km2) or to dismiss all "the many hundreds" of eyewitness accounts. Napier concluded, "I am convinced that Sasquatch exists, but whether it is all it is cracked up to be is another matter altogether. There must be something in north-west America that needs explaining, and that something leaves man-like footprints."
Beginning in the late 1970s, physical anthropologist Grover Krantz published several articles and four book-length treatments of Sasquatch. However, his work was found to contain multiple scientific failings including falling for hoaxes.
A study published in the Journal of Biogeography in 2009 by J.D. Lozier et al. used ecological niche modeling on reported sightings of Bigfoot, using their locations to infer Bigfoot's preferred ecological parameters. They found a very close match with the ecological parameters of the American black bear, Ursus americanus. They also note that an upright bear looks much like Bigfoot's purported appearance and consider it highly improbable that two species should have very similar ecological preferences, concluding that Bigfoot sightings are likely sightings of black bears.
In the first systematic genetic analysis of 30 hair samples that were suspected to be from bigfoot, yeti, sasquatch, almasty or other anomalous primates, only one was found to be primate in origin, and that was identified as human. A joint study by the University of Oxford and Lausanne's Cantonal Museum of Zoology and published in the Proceedings of the Royal Society B in 2014, the team used a previously published cleaning method to remove all surface contamination and the ribosomal mitochondrial DNA 12S fragment of the sample was sequenced and then compared to GenBank to identify the species origin. The samples submitted were from different parts of the world, including the United States, Russia, the Himalayas, and Sumatra. Other than one sample of human origin, all but two are from common animals. Black and brown bear accounted for most of the samples, other animals include cow, horse, dog/wolf/coyote, sheep, goat, raccoon, porcupine, deer and tapir. The last two samples were thought to match a fossilized genetic sample of a 40,000 year old polar bear of the Pleistocene epoch; however, a later study disputes this finding. In the second paper, tests identified the hairs as being from a rare type of brown bear.
After what The Huffington Post described as "a five-year study of purported Bigfoot (also known as Sasquatch) DNA samples", but prior to peer review of the work, DNA Diagnostics, a veterinary laboratory headed by veterinarian Melba Ketchum, issued a press release on November 24, 2012, claiming that they had found proof that the Sasquatch "is a human relative that arose approximately 15,000 years ago as a hybrid cross of modern Homo sapiens with an unknown primate species." Ketchum called for this to be recognized officially, saying that "Government at all levels must recognize them as an indigenous people and immediately protect their human and Constitutional rights against those who would see in their physical and cultural differences a 'license' to hunt, trap, or kill them."
Failing to find a scientific journal that would publish their results, Ketchum announced on February 13, 2013 that their research had been published in the DeNovo Journal of Science. The Huffington Post discovered that the journal's domain had been registered anonymously only nine days before the announcement. This was the only edition of DeNovo and was listed as Volume 1, Issue 1, with its only content being the Ketchum paper.
Shortly after publication, the paper was analyzed and outlined by Sharon Hill of Doubtful News for the Committee for Skeptical Inquiry. Hill reported on the questionable journal, mismanaged DNA testing and poor quality paper, stating that "The few experienced geneticists who viewed the paper reported a dismal opinion of it noting it made little sense."
The Scientist magazine also analyzed the paper, reporting that:
Geneticists who have seen the paper are not impressed. "To state the obvious, no data or analyses are presented that in any way support the claim that their samples come from a new primate or human-primate hybrid," Leonid Kruglyak of Princeton University told the Houston Chronicle. "Instead, analyses either come back as 100 percent human, or fail in ways that suggest technical artifacts." The website for the DeNovo Journal of Science was setup [sic] on February 4, and there is no indication that Ketchum's work, the only study it has published, was peer reviewed.
Numerous plaster casts of alleged Bigfoot footprints exist and some of these casts have been studied by individuals such as fingerprint expert and former police crime scene investigator Jimmy Chilcutt. Chilcutt examined multiple casts of alleged Bigfoot footprints and using his experience in dermatoglyphics, believes that some of these casts contain unique dermal ridges and even evidence of healed scars.  A body print taken in the year 2000 from the Gifford Pinchot National Forest in Washington state dubbed the Skookum cast is also believed by some to have made by a Sasquatch that sat down in the mud to eat fruit left out by researchers during the filming of an episode of the Animal X television show. Skeptics believe the cast to have been made by a known animal such as an elk.
Claims about the origins and characteristics of Bigfoot have also crossed over with other paranormal claims, including that Bigfoot, extraterrestrials, and UFOs are related or that Bigfoot creatures are psychic, can cross into different dimensions, or are completely supernatural in origin. Other claims have been made linking the creatures to a religious origin, specifically that they are Biblical Nephilim.
There are several organizations dedicated to the research and investigation of Bigfoot sightings in the United States. The oldest and largest is the Bigfoot Field Researchers Organization (BFRO). The BFRO also provides a free database to individuals and other organizations. Their website includes reports from across North America that have been investigated by researchers to determine credibility. Another includes the North American Wood Ape Conservancy (NAWAC) which prefers to refer to the creature as the "North American Wood Ape".  Other similar organizations exist throughout many U.S. states and in the provinces and territories of Canada.
In February 2016, the University of New Mexico at Gallup held a two-day Bigfoot conference, at a cost of $7,000 in university funds.
In popular culture
Bigfoot has had a demonstrable impact as a popular culture phenomenon. It has "become entrenched in American popular culture and it is as viable an icon as Michael Jordan" with more than forty-five years having passed since reported sightings in California, and neither an animal nor "a satisfying explanation as to why folks see giant hairy men that don't exist".
The act of searching for or researching the creatures has come to commonly be referred to in popular culture as "Squatching" or "Squatch'n" and is a common phrase seen on apparel such as shirts and hats related to Bigfoot.
When asked for her opinion of Bigfoot in a September 27, 2002, interview on National Public Radio's "Science Friday", Jane Goodall said "I'm sure they exist", and later said, chuckling, "Well, I'm a romantic, so I always wanted them to exist", and finally, "You know, why isn't there a body? I can't answer that, and maybe they don't exist, but I want them to." In 2012, when asked again by the Huffington Post, Goodall said "I'm fascinated and would actually love them to exist," adding, "Of course, it's strange that there has never been a single authentic hide or hair of the Bigfoot, but I've read all the accounts."
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